Skip to content
Disclosery

Summa Corp.: BRK-B position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Summa Corp. on BRK-B, newest first. How the timeline and the estimate are built.

Summa Corp. held 5,367 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-08-06.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 5,367 shares
    Change vs previous 13F +299 shares

    0.84% of the 13F portfolio, value $2,685,593.

    13F-HR 0001214659-26-009701 filed by Summa Corp.
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  2. period ended2026-03-31
    13F 5,068 shares
    Change vs previous 13F +217 shares

    1% of the 13F portfolio, value $2,428,586.

    13F-HR 0001214659-26-005326 filed by Summa Corp.
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2025-12-31
    13F 4,851 shares
    Change vs previous 13F +250 shares

    1.05% of the 13F portfolio, value $2,438,355.

    13F-HR 0001214659-26-000679 filed by Summa Corp.
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-09-30
    13F 4,601 shares
    Change vs previous 13F +233 shares

    1.02% of the 13F portfolio, value $2,313,107.

    13F-HR 0001214659-25-015365 filed by Summa Corp.
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  5. period ended2025-06-30
    13F 4,368 shares
    Change vs previous 13F -170 shares

    1.1% of the 13F portfolio, value $2,121,843.

    13F-HR 0001214659-25-010906 filed by Summa Corp.
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  6. period ended2025-03-31
    13F 4,538 shares
    Change vs previous 13F +36 shares

    1.4% of the 13F portfolio, value $2,416,848.

    13F-HR 0001214659-25-006133 filed by Summa Corp.
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  7. period ended2024-12-31
    13F 4,502 shares
    Change vs previous 13F -260 shares

    1% of the 13F portfolio, value $2,040,667.

    13F-HR 0001214659-25-001191 filed by Summa Corp.
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  8. period ended2024-09-30
    13F 4,762 shares
    Change vs previous 13F not available

    1.05% of the 13F portfolio, value $2,191,758.

    13F-HR 0001214659-24-017623 filed by Summa Corp.
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).